Theories of Transubstantial Transfiguration was a book that covered Transubstantial Transfiguration, a copy of which resides in the library of Hogwarts School of Witchcraft and Wizardry.


The librarian, Irma Pince, added unusual jinxes to the copy, so that when Albus Dumbledore absent-mindedly doodled on a copy, it began to beat him around the head.[1]


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